Silky smooth chocolate on short bread.
From: Martha Stewart

Preheat oven to 350
Line a 9-inch square baking pan with parchment leaving an overhang on all sides; butter parchment excluding overhang.
Beat butter and brown sugar on medium speed until pale and fluffy about 3 minutes. Add flour and salt, beat until just combined.
Press dough evenly into pan and bake until lightly browned about 30 Minutes
Place chocolate in a medium bowl. Heat granulated sugar and water in a small saucepan over medium-high heat washing sides of pan with a wet pastry brush to prevent sugar crystals from forming until amber 10 Minutes to 12 minutes. Remove from heat. Add butter cream and table salt. Bring to a boil stirring until smooth. Pour over chocolate. Let stand for 2 minutes. Stir to combine and let stand until cool about 10 minutes.
Pour mixture over crust. Refrigerate at least 4 hours or overnight. Run a knife around edges; lift parchment to remove whole bar from pan. Sprinkle with sea salt. Trim edges and cut into 16 bars.
8 servings